Abstract
Large diameter fabricated steel tubes subjected to transverse shear forces and bending moments can fail either in a local compression buckling mode because of flexure or in a diagonal buckling failure mode as a result of shear forces. Drawing on recent work by the writers at the University of Alberta, the ultimate shear strength is investigated through a parametric study to determine the factors affecting failure. A nonlinear regression analysis is then carried out using the available experimental data to derive an empirical relation for the ultimate shear strength. The formula is compared to the current design approach and found to perform better throughout the range of applicability.
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